JP2001025647A - Electrical deionizing apparatus - Google Patents

Electrical deionizing apparatus

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Publication number
JP2001025647A
JP2001025647A JP11199246A JP19924699A JP2001025647A JP 2001025647 A JP2001025647 A JP 2001025647A JP 11199246 A JP11199246 A JP 11199246A JP 19924699 A JP19924699 A JP 19924699A JP 2001025647 A JP2001025647 A JP 2001025647A
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Japan
Prior art keywords
chamber
small
water
ion
filled
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Granted
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JP11199246A
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Japanese (ja)
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JP3389889B2 (en
Inventor
Tomoaki Deguchi
智章 出口
Original Assignee
Kurita Water Ind Ltd
栗田工業株式会社
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Priority to JP19924699A priority Critical patent/JP3389889B2/en
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J47/00Ion-exchange processes in general; Apparatus therefor
    • B01J47/02Column or bed processes
    • B01J47/06Column or bed processes during which the ion-exchange material is subjected to a physical treatment, e.g. heat, electric current, irradiation or vibration
    • B01J47/08Column or bed processes during which the ion-exchange material is subjected to a physical treatment, e.g. heat, electric current, irradiation or vibration subjected to a direct electric current
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D61/00Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis, ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
    • B01D61/42Electrodialysis; Electro-osmosis Electro-ultrafiltration
    • B01D61/44Ion-selective electrodialysis
    • B01D61/46Apparatus therefor
    • B01D61/48Apparatus therefor having one or more compartments filled with ion-exchange material, e.g. electrodeionisation
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/42Treatment of water, waste water, or sewage by ion-exchange
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/46Treatment of water, waste water, or sewage by electrochemical methods
    • C02F1/469Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/46Treatment of water, waste water, or sewage by electrochemical methods
    • C02F1/469Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis
    • C02F1/4693Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis electrodialysis
    • C02F1/4695Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis electrodialysis electrodeionisation
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00Water conservation; Efficient water supply; Efficient water use
    • Y02A20/10Relating to general water supply, e.g. municipal or domestic water supply
    • Y02A20/124Water desalination
    • Y02A20/126Water desalination characterized by the method
    • Y02A20/134Electrodialysis

Abstract

(57) [Summary] [PROBLEMS] Various ion exchangers can be filled by arranging a large number of small chambers in, for example, a vertical direction and a horizontal direction in a desalination chamber. Provided is an electric deionization apparatus which can be arbitrarily selected for filling and can increase the packing density of an ion exchanger. SOLUTION: The desalination chamber has a rectangular frame 20,
A partitioning member 21 preferably having conductivity disposed in the frame 20, an ion exchanger 23 filled in a small chamber 22 formed by the partitioning member 21, and an anion disposed so as to sandwich the frame 20 It is composed of an exchange membrane 24 and a cation exchange membrane 25. The partition member 21 has a hexagonal honeycomb shape, and is disposed such that a pair of side edges is in the longitudinal direction of the frame 20, that is, in the up-down direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric deionization apparatus, and more particularly to an apparatus for continuously producing high-purity pure water by improving the specific resistance of treated water and the removal rate of weak electrolyte anions. The present invention relates to an electric deionization device that can be used.

[0002]

2. Description of the Related Art In an electric deionization apparatus, a plurality of cation exchange membranes and anion exchange membranes are alternately arranged between electrodes, and a desalination chamber and a concentration chamber are formed alternately. It has a configuration filled with an ion exchanger. In this electric deionization device, while applying the voltage between the anode and the cathode, the water to be treated flows into the desalination chamber, and the concentrated water flows into the concentration chamber to remove impurity ions in the water to be treated. Produce deionized water.

FIG. 12 is an exploded view showing the basic structure of this electric deionization apparatus.

A cathode electrode plate 2 is arranged along a cathode-side end plate 1, and a frame-shaped cathode spacer 3 is superimposed on the periphery of the cathode electrode plate 2. On the cathode spacer 3, a cation exchange membrane 4, a frame 5 for forming a desalting chamber, an anion exchange membrane 6, and a frame 7 for forming a concentration chamber are stacked in this order. The cation exchange membrane 4, the frame 5 for forming the desalting chamber, and the anion exchange membrane 6
In addition, a large number of the frames 7 for forming the enrichment chamber are superposed. That is, the film 4, the frame 5, the film 6, and the frame 7 are continuously and repeatedly laminated. An anode electrode plate 9 is superimposed on the last anion exchange membrane 6 via a frame-shaped anode spacer 8, and an anode-side end plate 10 is superimposed thereon to form a laminate. This laminate is fastened with bolts or the like.

[0005] The inner space of the desalting chamber frame 5 is a desalting chamber, and the desalting chamber is filled with an ion exchanger 5R such as an ion exchange resin. The inside of the enrichment chamber frame 7 is an enrichment chamber. A mesh spacer or the like is arranged in this concentration chamber.

In such an apparatus, a direct current is passed between the anode 9 and the cathode 2 and the water to be treated (raw water) is passed through the treated water inflow line 11 into the desalination chamber, and the water is concentrated. Water is passed through the concentrated water inflow line 12 into the concentration chamber 8. The water to be treated that has flowed into the deionization chamber flows down the packed bed of the ion exchange resin. At that time, impurity ions in the water to be treated are removed to become deionized water, which flows out through the deionized water outflow line 13. I do.

On the other hand, the concentrated water passed through the concentration chamber receives impurity ions moving through the ion exchange membranes 4 and 6 when flowing down the concentration chamber, and concentrates the concentrated ions as concentrated water. It flows out from the water outflow line 14. Electrode water is circulated through the electrode chambers via flow guide lines 15 and 16 and extraction lines 17 and 18, respectively.

Japanese Patent Publication No. 4-72567 discloses an electric deionization apparatus in which partition ribs are provided vertically in a desalination chamber, and the desalination chamber is divided into small chambers which are long in the vertical direction. As described above, in the electric deionization apparatus in which the deionization chamber is partitioned into the elongated small chambers by the ribs and each of the small chambers is filled with the ion exchange resin, the deionization chamber is locally biased from the entrance to the exit of the desalination chamber. The channeling phenomenon in which water flows is prevented, and the ion exchange resin is prevented from being compressed or moved in the desalting chamber.

[0009]

SUMMARY OF THE INVENTION The above-mentioned Japanese Patent Publication No. 4-72.
In the electric deionizer of No. 567, the number of small chambers is limited because the desalination chamber is divided into vertically elongated small chambers. That is, too many small chambers cannot be formed. Further, since the rib blocks the flow of water in the left-right direction, the contact efficiency between the water and the ion exchange resin is poor. Further, there is a disadvantage that the ion exchange resin is compressed at the lower portion of the small chamber and a gap is formed at the upper portion, and the filling rate of the ion exchange resin tends to be low.

An object of the present invention is to provide an electric deionization apparatus which overcomes these various disadvantages, has a high contact efficiency between water and an ion exchanger, and has a high packing density of an ion exchanger and the like. I do.

Another object of the present invention is to provide an electric deionization apparatus capable of supplying currents at partially different current densities in one desalting chamber.

[0012]

In the electric deionization apparatus of the present invention, the deionization chamber is divided into a number of small chambers by a partition member, and each of the small chambers is filled with an ion exchanger. At least a part of the partition member facing each of the small chambers is inclined with respect to the average flow direction of water in the desalting chamber, and the inclined part allows water to pass, but does not allow the ion exchanger to pass. It has a structure. For this reason, at least a part of the water that has flowed into the desalting chamber flows in an oblique direction with respect to the average flow direction of the water, and flows dispersedly throughout the desalting chamber. Therefore, the contact efficiency between water and the ion exchanger is improved,
Deionization characteristics are improved.

[0013] By arranging a plurality of such chambers along the membrane surface in both the average flow direction of water and the direction perpendicular thereto, (for example, by arranging many in the vertical and horizontal directions), water and the ion exchanger The contact efficiency with the contact is extremely high. In addition, the height in each of the small chambers in the vertical direction is reduced, and the ion exchanger is less likely to be locally compressed. Therefore, there is no gap in the small chamber, and the packing density of the ion exchanger is high.

This chamber preferably has a hexagonal or quadrangular shape projected onto the ion exchange membrane surface. In the case of a hexagon, it is preferable to arrange the small chambers such that a pair of parallel sides is in an average flow direction of water. In the case of a quadrangle, they are arranged such that each side is inclined with respect to the average flow direction of water.

In the present invention, all the compartments may be filled with the same type of ion exchanger, or some of the compartments may be filled with ion exchangers having ion exchange characteristics different from those of the other compartments. For example, one compartment is filled with an anion exchanger, another compartment is filled with a cation exchanger, and the remaining compartments are filled with an amphoteric ion exchanger (or a mixture of an anion exchanger and a cation exchanger). It may be filled.

In the present invention, one compartment may be filled with only one type of ion exchanger having ion exchange characteristics, or may be filled with a plurality of types of ion exchangers having ion exchange characteristics. For example, an anion exchanger and an amphoteric ion exchanger may be mixed and filled in one compartment, or a cation exchanger and an amphoteric ion exchanger may be mixed in one compartment.

According to the present invention, in order to apply a voltage different from that of the other chambers to the chambers filled with ion exchangers having the same type of ion exchange characteristics, the electrodes are arranged in accordance with the arrangement of the chambers. It may be composed of a plurality of small electrodes insulated from each other.

Further, in the present invention, the electrode may be constituted by a plurality of small electrodes which are insulated from each other in accordance with the arrangement of each small chamber.

[0019]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an exploded perspective view showing a configuration of a desalination chamber according to an embodiment, FIG. 2 is a perspective view of a main part of a partition member, FIG. 3 is an exploded perspective view of the partition member, and FIG. FIG. 5 and FIG. 6 are front views showing an example of filling a partition member with an ion exchanger.

The desalting chamber has a rectangular frame 20.
And a partition member 21 preferably having conductivity disposed in the frame 20, an ion exchanger 23 filled in a small chamber 22 formed by the partition member 21, and disposed so as to sandwich the frame 20. And a cation exchange membrane 25.

In the upper part of the frame 20, water to be treated (raw water)
Hole 26 for introducing water and water hole 2 for concentrated water (inflow side)
7 is drilled, and a drain hole 28 for desalinated water and a drain hole 29 for concentrated water (discharge side) are drilled in the lower part. The raw water introduction water passage 26 and the desalinated water passage 28 communicate with the inside of the frame 20 through notched water passages 26a, 28a, respectively.

Although the water passage 26a is shown in FIG. 1 as communicating only with the upper left small chamber, the water passage 26a is actually connected to the frame 20 so that the raw water is evenly distributed to the left and right small chambers. And a plurality of water passage holes 26 are in direct communication with the uppermost small chambers. Similarly, in FIG. 1, the water passage 28 a is illustrated as communicating only with the lower right chamber. However, actually, a plurality of water passages 28 a are provided at the lower portion of the frame 20, and the water passage hole 28 is located at the lowermost position. Is in direct communication with each small room.

The partition member 21 according to this embodiment has a hexagonal honeycomb shape, and a large number of small chambers 22 are arranged vertically and horizontally. Each of the small chambers 22 is arranged such that a pair of side sides thereof are in the longitudinal direction of the frame 20, that is, in the up-down direction.

The partition member 21 may be formed in advance integrally or may be a combination of a plurality of members. For example, as shown in FIG. 3, it is configured by connecting the longitudinal surfaces 31 of the zigzag bent plate 30 to each other. This bent plate 30 is 120
It has water-permeable inclined surfaces 32 and 33 connected at an angle of ゜. To connect the longitudinal surfaces 31 to each other, for example, an adhesive can be used. The bent plate 30 is made of a material that allows water to pass but does not allow the ion exchanger to pass, such as a woven fabric, a nonwoven fabric, a mesh, and a porous material.
The bent plate 30 is preferably made of a synthetic resin or metal having acid resistance and alkali resistance so as to have rigidity. The longitudinal surface 31 may or may not have water permeability.

The partition member 21 may be fitted into the frame 20. Alternatively, a water-permeable sheet or mesh may be stretched on one side of the frame 20 and a partition member may be adhered thereto.

The overall structure of the electric deionization apparatus having the deionization chamber is the same as that of FIG. 12, and the flow paths of raw water, concentrated water and electrode water are also the same.

When the desalination operation is performed by passing water through the electric deionization apparatus, the raw water flowing into the desalination chamber passes through the partition member 21 surrounding the small chamber 22 as shown in FIG.
, And gradually flows downward while undergoing deionization. And finally it reached the lower part of the desalination room,
It flows into the hole 28 for taking out deionized water via 8a, and is taken out of the electric deionization apparatus as deionized water.

The average flow direction of water in the desalting chamber is as follows: a water passage 26a for inflow of raw water is located above the frame 20, and a water passage 28a for removing desalinated water is located below the frame 20. The vertical direction is from top to bottom. Since the upper and lower portions of the small chamber are inclined with respect to the average flow direction of the water, the water to be treated is one small chamber 22.
, And flow obliquely into the small chambers 22 on the left and right sides. For this reason, the water to be treated flows almost uniformly dispersed in each of the small chambers 22, and the contact efficiency between the water to be treated and the ion exchanger is improved.

In this desalting chamber, the small chambers 22 are relatively small, and each of the small chambers 2 depends on the weight of the ion exchanger and the water pressure.
The downward pressure applied to the ion exchanger in 2 is small. Therefore, the ion exchanger is not compressed in any of the small chambers 22, and the ion exchanger is not locally compacted in the lower part of the small chamber.

The ion exchanger filled in each small chamber 22 may be an anion exchanger, a cation exchanger, an amphoteric ion exchanger, or a mixture of two or more of these. Some examples of filling patterns are as follows.

(I) Fill all compartments with one of an anion exchanger, a cation exchanger and an amphoteric ion exchanger.

(Ii) Fill all compartments with a mixture of two or three of an anion exchanger, a cation exchanger and an amphoteric ion exchanger. The mixing ratio and the mixed species may all be common, or may be different in some or all of the small chambers.

(Iii) Some compartments are filled with an anion exchanger, other compartments are filled with a cation exchanger, and the remaining compartments are a mixture of an anion exchanger and a cation exchanger or an amphoteric ion exchanger. Fill. (In the case of a mixture, the mixing ratio and the mixed species may all be common, or may be different in some or all of the compartments.) FIG. 5 shows an example of this, where A is an anion exchanger, C indicates a cation exchanger, M indicates an amphoteric ion exchanger or a mixture. In FIG. 5, the types of ion exchangers are different in all adjacent small chambers, but the filling pattern is not limited to this. For example, all of the laterally adjacent compartments are filled with an anion exchanger, the lower stage is filled with all of the laterally adjacent compartments with a cation exchanger, and the lower stage is laterally filled. All of the adjacent compartments are filled with an amphoteric ion exchanger (or a mixture of an anion exchanger and a cation exchanger).

(Iv) As shown in FIG. 6, the same type of ion exchanger is filled in each of the upper, middle and lower regions in the desalination chamber.
In the adjacent region, the type of the ion exchanger is made different. In FIG. 6, the compartments in the upper and lower regions are filled with a mixture (or amphoteric ion exchanger) of an anion exchanger and a cation exchanger, and the compartment in the middle region is filled with an anion exchanger. Is filled. In the case of a mixture, the mixing ratio may be the same, or may be different in some or all of the small chambers.

In the cases (ii) to (iv), the number of small chambers filled with an anion exchanger and the number of small chambers filled with a cation exchanger may be adjusted according to the ratio of anion and cation in raw water.

In order to improve the removal rate of weak electrolytes such as silica, carbonic acid, and boron, it is desired to make the electrolyte alkaline. However, it is possible to obtain suitable removal conditions by increasing the number of small chambers filled with an anion exchanger.

In the present invention, the electrode plates on both the anode side and the cathode side may be composed of one plate or sheet of the same size as the desalting chamber. It may be a combination.

As shown in FIG. 6, when the types of ion exchangers to be filled in each of the small chambers of the desalting chamber are divided into upper, middle and lower regions, the electrode plate is moved upward as shown in FIG. ,During,
It is composed of the lower three small electrode plates 41, 42, 43.
A configuration in which an electric insulator 44 is arranged between the middle and lower small electrode plates 41, 42, 43 may be adopted. By doing so, it is possible to flow a current so that a different current density is obtained for each region in the desalination chamber.

In FIG. 6, the electrode plates are composed of medium-sized electrode plates 41, 42 and 43 arranged in three stages of upper, middle and lower. It may be divided into the above. In addition, a hexagonal hexagonal electrode plate having a size slightly smaller than the small chamber 22 is combined with an electrical insulator interposed between the hexagonal electrode plates to form a composite electrode plate having substantially the same size as the desalting chamber. May be configured. in this case,
The current density to be supplied to each of the small chambers can be individually controlled.

Since it is effective to increase the current density to remove the weak electrolyte, only the small chamber (one or more) intended to remove the weak electrolyte has a higher current density than the other parts. It may be adjusted as follows.

In FIGS. 1 to 6, the small chamber is hexagonal.
May be square, for example, a rhombus like the small chamber 45 of FIG. As shown in FIG. 9, the partitioning member 46 forming the quadrangular chamber has a zigzag water-permeable member 4 composed of inclined surfaces 47 and 48.
It can be formed by connecting the vertices of 9, 49 to each other. An adhesive may be used to connect the water-permeable members 49 to each other, or cuts (not shown) provided in each of the water-permeable members 49 may be engaged with each other.

The partition member is a triangular small chamber 5 as shown in FIG.
0 may be used as the triangular lattice-shaped partition member 51,
As shown in FIG. 11, a partition member 55 having a triangular small chamber 54 in which the horizontal member 52 and the corrugated plate member 53 are combined may be used.

[0043] In the electrical deionization apparatus of the present invention, the projected area to the ion exchange membrane surface of the chamber is 1 to 100 cm 2, especially 5~80Cm 2 especially 10 to 50 cm 2 is preferably about. The distance between the pair of anion exchange membrane and cation exchange membrane sandwiching the desalting chamber, that is, the thickness of the desalting chamber is preferably 1.5 to 15 mm, particularly about 3 to 10 mm. In addition, the smaller the small chamber, the smaller the amount of the ion exchanger filled in one small chamber, the flow of the ion exchanger is suppressed, and the strength of the partition member and the desalination chamber is increased. The water pressure loss increases.

The thickness of the concentration chamber is preferably about 0.3 to 1 mm. It is desirable to arrange a spacer of about 20 to 60 mesh in the concentration chamber.

The ion exchanger to be filled is usually an ion exchange resin, but may be an ion exchange fiber or an ion exchange nonwoven fabric, or a mixture of the ion exchange resin and the ion exchange fiber. An ionic conductor such as a conductive resin may be used.

The ion exchanger may be an anion exchanger, a cation exchanger, a mixture thereof, or an amphoteric ion exchanger.

As the anion exchanger, an I-type anion exchange resin and a II-type anion exchange resin are known, but any of them may be used. It is preferable to mix and fill the type I having a large basicity with the type II having excellent regeneration efficiency, reaction rate and strength to promote separation of ions at a low current. Type I and
The mixing ratio of type II is preferably about 1: 2-5.

The higher the regeneration ratio of the ion exchanger in the desalting chamber, the higher the quality of the treated water. Therefore, it is preferable to increase the split amount of water ions and hydroxyl ions that contribute to the regeneration of the ion exchanger. For that purpose, it is preferable to mix about 5 to 30% of an amphoteric ion exchanger having a function of simultaneously splitting water into hydrogen ions and hydroxyl ions.

The particle size of the ion exchanger is preferably about 0.1 to 1 mm, particularly about 0.2 to 0.6 mm. It is preferable that this ion exchanger is accommodated in the small chamber in an amount of about 100 to 140% of the volume of the small chamber, and then sandwiched by ion exchange membranes from both sides, and the ion exchanger is densely packed in the small chamber.

When assembling an electric deionization apparatus by filling a small chamber with an ion exchanger, the small chamber is filled with the ion exchanger, ion exchange membranes are installed at both ends, raw water is supplied, and internal ion exchange is performed. After swelling the body, the compartments may be tightened so that the volume ratio is about 100-102%.

Further, an ion exchanger can be filled in the concentration chamber. By filling the concentration chamber with an ion exchanger, the current easily flows, and the turbulence effect is also improved,
The current efficiency is improved. Instead of a spacer arranged in the concentration chamber, a large number of small chambers are formed with partitioning members as in the desalination chamber,
Each compartment may be filled with an ion exchanger.

In general, since the cathode chamber exhibits alkalinity, acidic anodic water passed through the anode chamber is usually supplied, neutralized in the cathode chamber, and partially turned into pure water. For this reason, the conductivity of the cathode chamber decreases, the voltage locally increases, and scale easily occurs. In order to avoid this situation, it is preferable to prevent the generation of scale by increasing the electrode area by using a mesh electrode or an electrode in which a nonwoven fabric electrode is used alone or in combination, and reducing the current density on the electrode surface.

When operating the electric deionization apparatus of the present invention, the concentrated water is circulated and the ion concentration in the circulated water is adjusted to 5
It is desirable to control within a range of up to 40 times. In this case, it is preferable that the hardness component, which is a scale component of the concentrated water, is electrically separated and eliminated, and the Langereria index in the circulating water is set to a negative value. A weakly acidic ion exchange resin may be used for removing the hardness component.

[0054]

According to the present invention, various ion exchangers can be filled by arranging a large number of small chambers in, for example, the vertical and horizontal directions in the desalting chamber, and the arrangement and the mixing ratio of the ion exchangers can be changed according to the purpose. It can be arbitrarily selected and filled. In addition, by providing many small rooms, the area of one room is reduced,
The packing density of the ion exchanger can be increased. In addition, even if there is insufficient filling in some small chambers,
The filling density can be increased as a whole without affecting other small chambers. By increasing the number of small chambers, the ion exchanger can be filled evenly and the strength can be increased, so that the ion exchanger can be strongly compressed and held.

In the present invention, since water can pass through the partition member, the water can pass through a plurality of small chambers, and each of the small chambers can be treated according to the conditions of the chamber.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a configuration of a desalination chamber according to an embodiment.

FIG. 2 is a perspective view of a main part of a partition member.

FIG. 3 is an exploded perspective view of a partition member.

FIG. 4 is a front view illustrating a water passing state of the partition member.

FIG. 5 is a front view showing an example of filling a partition member with an ion exchanger.

FIG. 6 is a front view showing an example of filling a partition member with an ion exchanger.

FIG. 7 is a perspective view showing an example of an electrode plate.

FIG. 8 is a front view showing an example of a partition member.

FIG. 9 is an exploded view of the partition member of FIG.

FIG. 10 is a front view showing another example of the partition member.

FIG. 11 is a front view showing still another example of the partition member.

FIG. 12 is an exploded perspective view showing a general configuration of an electric deionization apparatus.

[Explanation of symbols]

 Reference Signs List 20 frame 21 partition member 22 small chamber 23 ion exchanger 24 anion exchange membrane 25 cation exchange membrane 41, 42, 43 electrode plate 44 insulator 45, 50, 54 small chamber 51, 55 partition member

Claims (9)

    [Claims]
  1. Claims: 1. A plurality of cation exchange membranes and anion exchange membranes are alternately arranged between electrodes to form a desalting chamber and an enriching chamber alternately, and the desalting chamber is filled with an ion exchanger. In an electric deionization apparatus configured to allow water to be treated to flow through a desalination chamber and to flow concentrated water through a concentration chamber, a partition member is disposed in the desalination chamber, and the partition member and the cation exchange membrane are disposed. And a large number of small chambers surrounded by the anion exchange membrane are formed in the desalting chamber, each of the small chambers is filled with an ion exchanger, and at least a part of the partition member facing each of the small chambers is subjected to the desalination. The electric device is characterized in that it is inclined with respect to the average flow direction of water in the room, and at least the inclined portion of the partition member has a structure that allows water to pass therethrough but prevents passage of an ion exchanger. Deionizer.
  2. 2. The electric device according to claim 1, wherein a plurality of the chambers are arranged in both the average water flow direction and a direction perpendicular to the average water flow direction and along the membrane surface. Deionizer.
  3. 3. The electric deionization device according to claim 1, wherein the shape of the small chamber projected on the film surface is a hexagon or a quadrangle.
  4. 4. The electrodeionization apparatus according to claim 1, wherein at least a part of the small chambers is filled with an ion exchanger having the same type of ion exchange characteristics.
  5. 5. The electrodeionization apparatus according to claim 1, wherein at least a part of the compartments is filled with a plurality of types of ion exchangers having different ion exchange characteristics. .
  6. 6. The electrodeionization apparatus according to claim 5, wherein 5 to 30% of the ion exchangers in the at least some of the compartments are amphoteric ion exchangers.
  7. 7. The electrical deionization apparatus according to claim 1, wherein the ion exchange characteristics of the ion exchangers in some of the small chambers are different from those in the other small chambers.
  8. 8. The small chamber group according to claim 7, wherein the ion exchange characteristic corresponds to the arrangement of the small chamber groups in order to apply a different voltage to the small chamber group filled with the same type of ion exchanger than the other small chamber groups. Wherein the electrode comprises a plurality of small electrodes insulated from each other.
  9. 9. The electrical disconnection device according to claim 1, wherein the electrode is constituted by a plurality of small electrodes insulated from each other corresponding to the arrangement of the small chambers. Ion equipment.
JP19924699A 1999-07-13 1999-07-13 Electric deionizer Expired - Fee Related JP3389889B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP19924699A JP3389889B2 (en) 1999-07-13 1999-07-13 Electric deionizer

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
JP19924699A JP3389889B2 (en) 1999-07-13 1999-07-13 Electric deionizer
US09/613,565 US6344122B1 (en) 1999-07-13 2000-07-10 Electrodeionization apparatus
SG200003871A SG85713A1 (en) 1999-07-13 2000-07-11 Electrodeionization apparatus
TW089113791A TW496770B (en) 1999-07-13 2000-07-11 Electrodeionization apparatus
KR10-2000-0039927A KR100386528B1 (en) 1999-07-13 2000-07-12 Electrodeionization apparatus
DE60036160T DE60036160T2 (en) 1999-07-13 2000-07-12 electrodeionization
EP00305835A EP1068901B1 (en) 1999-07-13 2000-07-12 Electrodeionization apparatus

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005066079A1 (en) * 2004-01-09 2005-07-21 Kurita Water Industries Ltd. Electric deionization device and electric deionization method
US7247225B2 (en) 2002-07-01 2007-07-24 Kurita Water Industries Ltd. Electrodeionization apparatus
JP2010089093A (en) * 2003-04-11 2010-04-22 Millipore Corp Electrodeionization device

Families Citing this family (36)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6607647B2 (en) 2001-04-25 2003-08-19 United States Filter Corporation Electrodeionization apparatus with expanded conductive mesh electrode and method
US6649037B2 (en) 2001-05-29 2003-11-18 United States Filter Corporation Electrodeionization apparatus and method
US7203255B2 (en) * 2001-09-24 2007-04-10 Atheros Communications, Inc. Method and system to implement non-linear filtering and crossover detection for pilot carrier signal phase tracking
EP1436069B1 (en) 2001-10-15 2011-02-09 Siemens Water Technologies Holding Corp. Apparatus and method for fluid purification
DE60202512T2 (en) * 2001-10-31 2005-12-22 Kurita Water Industries, Ltd. Device for electrodeionization
JP2005512794A (en) * 2001-12-20 2005-05-12 アクアテック インターナショナル コーポレイション Separation deionization treatment
US7097753B2 (en) * 2002-07-30 2006-08-29 Zhejiang Omex Environmental Engineering Ltd. Dilute support frame for an EDI device
US6797140B2 (en) * 2002-08-06 2004-09-28 The University Of Chicago Electrodeionization method
WO2005028760A2 (en) 2003-09-19 2005-03-31 Usfilter Corporation Apparatus and method for connecting water treatment devices
US7846340B2 (en) * 2003-11-13 2010-12-07 Siemens Water Technologies Corp. Water treatment system and method
US7862700B2 (en) * 2003-11-13 2011-01-04 Siemens Water Technologies Holding Corp. Water treatment system and method
US8377279B2 (en) * 2003-11-13 2013-02-19 Siemens Industry, Inc. Water treatment system and method
US20050103717A1 (en) * 2003-11-13 2005-05-19 United States Filter Corporation Water treatment system and method
US7083733B2 (en) * 2003-11-13 2006-08-01 Usfilter Corporation Water treatment system and method
US7563351B2 (en) 2003-11-13 2009-07-21 Siemens Water Technologies Holding Corp. Water treatment system and method
EP1684902B1 (en) * 2003-11-13 2019-01-09 Evoqua Water Technologies LLC Water treatment methods
US7658828B2 (en) 2005-04-13 2010-02-09 Siemens Water Technologies Holding Corp. Regeneration of adsorption media within electrical purification apparatuses
EP1885655B1 (en) 2005-06-01 2014-12-17 Evoqua Water Technologies LLC Water treatment process by intermittent sanitization
CN100372598C (en) * 2006-04-21 2008-03-05 李光辉 Continuous electrodeionization device
US8114259B2 (en) 2006-06-13 2012-02-14 Siemens Industry, Inc. Method and system for providing potable water
US8277627B2 (en) 2006-06-13 2012-10-02 Siemens Industry, Inc. Method and system for irrigation
US10213744B2 (en) 2006-06-13 2019-02-26 Evoqua Water Technologies Llc Method and system for water treatment
US10252923B2 (en) 2006-06-13 2019-04-09 Evoqua Water Technologies Llc Method and system for water treatment
US20080067069A1 (en) 2006-06-22 2008-03-20 Siemens Water Technologies Corp. Low scale potential water treatment
US7820024B2 (en) 2006-06-23 2010-10-26 Siemens Water Technologies Corp. Electrically-driven separation apparatus
US7744760B2 (en) 2006-09-20 2010-06-29 Siemens Water Technologies Corp. Method and apparatus for desalination
CA2707214A1 (en) 2007-11-30 2009-06-11 Siemens Water Technologies Corp. Systems and methods for water treatment
US9010361B2 (en) 2011-10-27 2015-04-21 Pentair Residential Filtration, Llc Control valve assembly
US8961770B2 (en) 2011-10-27 2015-02-24 Pentair Residential Filtration, Llc Controller and method of operation of a capacitive deionization system
US9695070B2 (en) 2011-10-27 2017-07-04 Pentair Residential Filtration, Llc Regeneration of a capacitive deionization system
US8671985B2 (en) 2011-10-27 2014-03-18 Pentair Residential Filtration, Llc Control valve assembly
US9637397B2 (en) 2011-10-27 2017-05-02 Pentair Residential Filtration, Llc Ion removal using a capacitive deionization system
US9834458B2 (en) 2012-01-30 2017-12-05 Hydronovation, Inc. Performance enhancement of electrochemical deionization devices by pre-treatment with cation exchange resins
RU2480416C1 (en) * 2012-03-26 2013-04-27 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Астраханский государственный университет" Apparatus for increasing biological activity of water
GB201216526D0 (en) * 2012-09-17 2012-10-31 Vws Uk Ltd Water treatment method and apparatus
JP2019181373A (en) * 2018-04-11 2019-10-24 株式会社島津製作所 Field flow fractionation device

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4956071A (en) * 1984-07-09 1990-09-11 Millipore Corporation Electrodeionization apparatus and module
US4931160A (en) * 1987-05-11 1990-06-05 Millipore Corporation Electrodeionization method and apparatus
JPH0472567A (en) 1990-07-13 1992-03-06 Canon Inc Method and device for measuring immunologically active material
DE4418812C2 (en) * 1994-05-30 1999-03-25 Forschungszentrum Juelich Gmbh Single and multiple electrolysis cells and arrangements thereof for the deionization of aqueous media
JP3273707B2 (en) * 1994-11-29 2002-04-15 オルガノ株式会社 Production method of deionized water by electrodeionization method
DE69716852T2 (en) * 1996-03-21 2003-09-11 Asahi Glass Co Ltd Method and device for producing deionized water
US5868915A (en) * 1996-09-23 1999-02-09 United States Filter Corporation Electrodeionization apparatus and method

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7247225B2 (en) 2002-07-01 2007-07-24 Kurita Water Industries Ltd. Electrodeionization apparatus
JP2010089093A (en) * 2003-04-11 2010-04-22 Millipore Corp Electrodeionization device
JP2014004586A (en) * 2003-04-11 2014-01-16 E M D Millipore Corp Electric deionization device
WO2005066079A1 (en) * 2004-01-09 2005-07-21 Kurita Water Industries Ltd. Electric deionization device and electric deionization method
US7520971B2 (en) 2004-01-09 2009-04-21 Kurita Water Industries Ltd. Apparatus and method for electrodeionization
KR101163244B1 (en) 2004-01-09 2012-07-05 쿠리타 고교 가부시키가이샤 Electric deionization device and electric deionization method

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JP3389889B2 (en) 2003-03-24
KR100386528B1 (en) 2003-06-02
EP1068901A2 (en) 2001-01-17
EP1068901B1 (en) 2007-08-29
DE60036160T2 (en) 2007-12-27
DE60036160D1 (en) 2007-10-11
TW496770B (en) 2002-08-01
EP1068901A3 (en) 2003-06-04
KR20010066923A (en) 2001-07-11
US6344122B1 (en) 2002-02-05

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